Sketch a graph of the function y=cos^-1x Part I: First, sketch at least two periods of the function y=cosx
on the graph below.
What are the domain and range of the function y=cosx
Restrict the domain of the functiony=cosx
so that it may be inverted. That is, select the portion of the graph ofcosx that is suitable for inverting. Mark that portion on your graph from Part I.

25 ! the line of best fit is h = 5a + 86. predict the height at age 16.

Dexter read 11 science fiction books and 5 history books. lena read 9 science fiction books and 4 history books. compare the students’ ratios of science fiction books to history books. 1. determine the ratios’ form:    science fiction books to history books 2. write the ratios as fractions:    dexter: 115; lena: 94 3. rewrite with a common denominator. 4. compare. 5. answer the question. determine which shows the correct comparison of the ratios for this problem.

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. 4x^2 + 20x + 25 = 0